I double nut the darn decapper on some of my dies because it just won't stay tight for some reason. I also use a decapping die for certain calibers(223 45 auto and 38s) as it is mostly range brass..meaning dirty..Have 3 set up on different old Herter's presses 2 in the garage and one down in the loading room in the basement. Those ol presses aren't worth much so I don't worry about dirt and such. Then I clean the cases inspect and load. Is there any differences tween different decapping dies? I have a couple Dillons and a Lee and Sinclair. I guess the big difference is the cost, huh? The 2 Dillon's were given to me. The Sinclair I have never used. Got it a a gun show for 15 bucks...new